T-K3-OS and T-K3-SP Instantaneous Water Heater Installation Manual and Owner’s Guide

WARNING This product must be installed and serviced by a licensed plumber, a licensed gas fitter, or a professional service technician. Improper installation and/or operation, or installation by an unqualified person, will void the warranty.

WARNING Flash Water Heater™

Flash Water Heater™

Model T-K3-OS

Model T-K3-SP

Suitable for potable water heating and space heating

FEATURING • • • • • •

If the information in this manual is not followed exactly, a fire or explosion may result, causing property damage, personal injury, or death.

TAKAGI Industrial Co. USA Inc.

ENDLESS HOT WATER ON DEMAND USAGE COMPACT, SPACE SAVING ENERGY CONSERVATION COMPUTERIZED SAFETY NO PILOT LIGHT

5 Whatney Irvine, CA 92618 Toll Free: (888) 882-5244 USA Toll Free: (877) 877-4953 CANADA

-1-

CONTENTS SPECIFICATIONS……………………...2 INTRODUCTION…………………….… 3 SAFETY GUIDELINES…………….….. 4 INSTALLATION……………………..…. 5 General…………………………….… 6 Accessories………………………….. 6 Outdoor Installation…………………. 7 Indoor Installation………………….... 9 Venting Instructions (T-K3-SP ONLY) … 10 Gas Supply / Gas Pipe Sizing…...… 14 Water Connections……………..……16 Pressure Relief Valve…………….… 17 Electrical Connections…………….... 18 Remote Controller Connection…..… 18 Initial Operation……………………… 19 NORMAL OPERATION…………..…… 20 Normal Operation…………………... 20 Flow………………………………...… 21 Freeze Protection System ………… 21 Temperature Setting ……………….. 22 Maintenance and Service………….. 23 TROUBLESHOOTING………………… 24 WIRING DIAGRAM……………………. 27 OPERATING SAFETY………………… 28 APPLICATIONS……………………….. 30 Space Heating………………………. 30 Dual-Purpose Heating……………… 31 Re-Circulation ………………………. 32 OPTIONAL ITEMS…………………….. 33 COMPONENTS DIAGRAM & PARTS LIST………. 34 OUTPUT TEMPERATURE CHART…. 38 WARRANTY …………………………… 39

SPECIFICATION T-K3-OS and T-K3-SP Natural Gas Input (Operating Range)

Min: 11,000 Btu/h Max: 190,000 Btu/h

LPG Input (Operating Range)

Min: 11,000 Btu/h Max: 190,000 Btu/h

Gas Connection

¾” NTP

Water Connections

¾” NTP

Water Pressure

15 - 150 psi*

Natural Gas Pressure Inlet

Min. 5.0” WC Max. 10.5” WC

LP Gas Pressure Inlet

Min. 8.0” WC Max. 13.5” WC

Manifold Pressure of the T-K3-OS

Natural: 2.8” WC Propane: 3.1” WC

Manifold Pressure of the T-K3-SP

Natural: 2.4” WC Propane: 4.1” WC

Weight

40 lbs.

Dimensions

H20.5” x W13.8” x D8.5”

Ignition

Electric Ignition Supply Consumption of the T-K3OS

Electric Consumption of the T-K3SP

120VAC (60Hz) Operation

92 W

Standby

6.2 W

FreezeProtection

111 W

Operation

92 W

Standby

6.2 W

FreezeProtection

111 W

*50 psi or above is recommended for maximum flow

NOTE -Check the rating plate to ensure this product matches your specifications. -In accordance with ANSI Z21.10.3 and SCAQMD Rule 1146.2, CO emission does not exceed 400 PPM for normal input. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. -2-

INTRODUCTION •

This manual provides information necessary for the installation, operation, and maintenance of the Model T-K3-OS/SP water heater.

•

The model description is listed on the rating plate which is attached to the front cover of the water heater.

•

Please read all installation instructions completely before installing this product.

•

If you have any problems or questions regarding this equipment, consult with Takagi or its local representative.

•

The T-K3-OS/SP Water Heater is an instantaneous, tankless water heater designed to efficiently supply endless hot water for your needs.

•

The principle behind the T-K3-OS/SP Water Heater is simple:

1. A hot water tap is turned on. 2. Water enters the heater. 3. The water flow sensor detects the water flow. 4. The computer automatically ignites the burner. 5. Water circulates through the heat exchanger and then gets hot. 6. The computer will modulate the gas supply valve and water flow to produce the right amount of hot water at the correct temperature. 7. When the tap is turned off, the unit shuts down. *This diagram is to illustrate Takagi’s tankless water heater design concepts only and may not be accurate to the T-K3-OS/SP’s physical description.

-3-

SAFETY GUIDELINES

WARNING

•

Installation and service must be performed by a qualified installer (for example, a licensed plumber or gas fitter), otherwise the warranty by Takagi will be void.

•

The installer (licensed professional) is responsible for the correct installation of your Flash T-K3-OS/SP Water Heater and for compliance with all national, state/provincial, and local codes. *For all units installed in the state of Massachusetts, it is required that the installer either be a licensed plumber or licensed gas fitter.

PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIONS.

GENERAL 1.

Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Code in Canada.

2.

Properly ground the unit in accordance with all local codes or in the absence of local codes, with the National Electrical Codes: ANSI/NFPA 70 in the USA or CSA standard C22.1 Canada Electrical Code Part 1 in Canada.

3.

Carefully plan where you intend to install your T-K3-OS/SP Water Heater. Please ensure: • Your water heater will have enough combustible air and proper ventilation. • Locate your heater where water leakage will not damage surrounding areas (please refer to p. 5).

4.

Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC RATING. *If this unit does not match your requirements, do not install and consult with Takagi.

5.

If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained technician or the Gas Company or the manufacturer.

RATING PLATE

WARNING • Water temperatures over 125ºF can cause severe burns instantly or death from scalding. The water temperature is set at 122ºF (50ºC) from the factory to minimize any scalding risk. Before bathing or showering always check the water temperature.

• • • Prohibited

•

Do not store or use gasoline or other flammables, vapors, or liquids in the vicinity of this appliance. Do not reverse the water and/or gas connections as this will damage the gas valves and can cause severe injury or death. Follow the diagram on p. 16 when installing your water heater: Do not use this appliance if any part has been in contact with or been immersed in water. Immediately call a licensed plumber, a licensed gas fitter, or a professional service technician to inspect and/or service the unit if necessary. Do not disconnect the electrical supply if the ambient temperature will drop below freezing. The Freeze Prevention System only works if the unit has electrical power. The warranty will not be covered if the heat exchanger is damaged due to freezing. Refer to the section on the Freeze Prevention System on p. 21 for more information.

-4-

INSTALLATION All gas water heaters require careful and correct installation to ensure safe and efficient operation. This manual must be followed exactly. Read the “Safety Guidelines” section at the beginning of this manual.

• The T-K3-OS must be installed OUTDOORS ONLY. DO NOT install the T-K3-OS indoors. The T-K3-SP can be installed either indoors or outdoors.

• The warranty will not cover damage caused by water quality. Water hardness may affect the water heater. Water heater may be damaged.

• The water heater must be installed vertically. CAUTION

• If the T-K3-SP is installed in a beauty salon, some chemicals used in a beauty salon may affect the flame sensor. Water heater may not work properly. TAKAGI recommends isolating the T-K3-SP from beauty salon elements.

• Although the T-K3-OS/SP is designed to operate with minimal sound, TAKAGI does not recommend installing the unit on a wall adjacent to a bedroom, or a room that is intended for quiet study or meditation, etc.

• Locate your heater close to a drain where water leakage will not do damage to surrounding areas. As with any water heating appliance, the potential for leakage at some time in the life of the product does exist. If there is no drain, Takagi will not be responsible for any water damage that may occur. If you install a drain pan under the unit, ensure that it will not restrict the combustion air flow.

• TAKAGI does not recommend installing unit in an attic due to safety issues. If you install your T-K3-SP in an attic:

WARNING

•

Make sure your unit will have enough combustion air and proper ventilation.

•

Keep the area around your T-K3-SP clean. When dust collects on the flame sensor, the water heater will shut down on errors.

•

Locate unit for easy access for service and maintenance.

•

A drain pan is required to be installed under the water heater in case of leaks.

-5-

GENERAL 1. The manifold gas pressure is preset at the factory. It is computer controlled and should not need adjustment. 2. Maintain proper space for servicing. Install the unit so that it can be connected or removed easily. Refer to p. 7 and p. 9 for proper clearances. 3. The electrical connection requires a means for switching off the power supply. 4. If you will be installing the unit in a contaminated area with a high level of dust, sand, flour, aerosols or other contaminants, they can become airborne and enter and build up within the fan and burner causing damage to the unit. Particles from flour, aerosols, and other contaminants may reduce the functions of the rotating fan and cause improper burning of the gas. Regularly ensure that the area around the unit is dust- or debris-free; regular maintenance is recommended for these types of environment. 5. Do not install the unit where the exhaust vent/opening is pointing into any opening in a building or where the noise may disturb your neighbors. Make sure the vent termination/exhaust opening meets the required distance by local code from any doorway or opening to prevent exhaust from entering a building (refer to p. 13).

ACCESSORIES Check that the installation manual and the warranty card are included with the unit.

-6-

OUTDOOR INSTALLATION 1. Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Code in Canada. 2. Outdoor installation for mild climates only. 3. When installing the T-K3-SP outdoors, ensure that the T-K3-SP is set for outdoor installation. Locate the bank of dipswitches at the bottom-right corner of the computer board. The ‘OUT’ dipswitch on the computer board should be switched to ‘ON’ (up). For the T-K3-OS, no dipswitches need to be changed. Make sure power to the unit is turned OFF before changing the dipswitch settings.

The dark square is the direction the dipswitch should be set to.

The dipswitch setting, as shown to the right, is for the T-K3-SP ONLY.

4. The outdoor vent cap must be used when the T-K3-SP is installed outdoor. Takagi requires the use of its part No. TK-TV04. 5. When installed outdoors, the T-K3-OS/SP water heater shall be wall mounted only. Locate the water heater in an open, unroofed area and maintain the following minimum clearances:

OS

SP

-7-

WARNING Do not install the heater where water, debris or flammable vapors may get into the flue terminal/opening. This may cause damage to the heater and void the warranty.

Do not have the vent terminal/opening pointing toward any opening into a building. Do not locate your heater in a pit or location where gas and water can accumulate.

Prohibited

Prohibited

Do not install this water heater under an overhang less than 3 feet from its top or eaves. The area under an overhang must be open to three sides.

Do not install the water heater vent terminator within 1 ft. in the USA of any air intake or building opening, and with in 3 ft. in Canada of any air intake or building opening (Refer to p.13).

T-K3-OS

Avoid locating the water heater exhaust opening near any air intake devices. These fans can pick up the exhaust flue products from the water heater and return them to the building. This can create a health hazard.

Prohibited T-K3-SP

-8-

INDOOR INSTALLATION (T-K3-SP ONLY) 1. Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Code in Canada.

SP

2. When installed indoors, the T-K3SP water heater shall be located in an area to maintain the following minimum clearances around the unit:

Combustion Air Supply The water heater location must provide enough air for proper combustion and ventilation of the surrounding area. See the latest edition of ANSI Standard Z223.1 or any applicable local codes. In general, these requirements specify that if the unit is installed in a confined space, there must be a permanent air supply opening. Minimum recommended air supply opening size for the T-K3-SP: Water heater size When drawing make-up air from When drawing make-up air from inside outside the building the building (from other rooms within)

MAX 190,000 BTU

12.7 Sq. IN

190 Sq. IN

When combustion air is supplied from outside the building, an opening communicating directly with the outside should have a minimum free area of one square inch per 15,000 BTUH input of the total input rating of water heater in the enclosed area.

When combustion air is supplied from inside the building, an opening communicating with the rest of the dwelling should have a minimum free area of one square inch per 1,000 BTUH input of the total input rating of water heater in the enclosed area. This opening should never be less than 190 sq. in.

Combustible Air Supplied by Mechanical fan or Make up air device The T-K3-SP water heater is equipped with a combustible air sensor that will shut off the unit when inadequate combustible air supply to unit is detected. •

If a mechanical fan or make up air device is used to supply air to the water heater or utility room, the installer should make sure it does not create drafts which could cause nuisance shutdowns.

•

If a blower is necessary to provide adequate combustion air to the water heater, the blower and water heater must be set up so that the water heater cannot fire unless the blower is operating. Possible methods include the use of external flow sensors/transmitters and relays. -9-

VENTING INSTRUCTIONS (T-K3-SP ONLY) WARNING: Improper venting of this appliance can result in excessive levels of carbon monoxide which can result in severe personal injury or death. This water heater must be vented in accordance with the section “Venting of Equipment" of the latest edition of the Natural Fuel Gas Code: The ANSI Z223.1, All applicable local building codes, Section 7 of the CAN/CSA B149.1 Natural Gas in Canada, Propane Installation Code in Canada.

EXHAUST VENT (T-K3-SP ONLY) This is a Category III appliance and must be vented accordingly. The vent system must be sealed air tight. All seams and joints without gaskets must be sealed with high-heat resistant silicone sealant or UL listed aluminum adhesive tape having a minimum temperature rating of 350ºF. For best results, a vent system should be as short and straight as possible. 1.

The T-K3-SP is a Category III appliance and must be vented accordingly with any 4” vent approved for use with Category III or Special BH type gas vent.

2.

The following are UL listed manufacturers: ProTech Systems Inc. (FasNSeal), Flex-L Inc., Z-Flex Inc. (Z-Vent III), Metal-Fab Inc., and Heat-Fab Inc. (Saf-T Vent).

3.

Follow the vent pipe manufacturer’s instructions when installing the vent pipe.

4.

Do not common vent this appliance with any other vented appliance (Do not terminate vent into a chimney. If the vent must go through the chimney, the vent must run all the way through the chimney with Category III approved or Special BH vent pipe).

5.

The maximum length of exhaust vent piping must not exceed 50 ft. deducting 5 ft. for each elbow used in the venting system. Do not use more than 5 elbows. Diameter

Max. No. of Elbow

Max. Vertical or Horizontal run in Length

4”

5 Ea.

50 ft.

*For each elbow added, deduct 5 ft. from max. Vent length. No. of Elbows 0 1 2 5

Max. Vertical or Horizontal Length 50 ft. 45 ft. 40 ft. 25 ft.

6.

When the horizontal vent run exceeds 5 ft., support the vent run at 3 ft. intervals with overhead hangars.

7.

Takagi will not be responsible for any damage to the water heater caused by condensation from the vent. For horizontal runs, slope the vent run downwards toward the vent terminal at a rate of ¼” per foot. For horizontal runs that do not slope downward and for vertical runs, installing a condensate drip is recommended. Please refer to p. 12 for the diagrams.

When installing the vent system, all applicable national and local codes must be followed. If you install thimbles, fire stops or other protective devices and they penetrate any combustible or noncombustible construction, be sure to follow all applicable national and local codes.

- 10 -

VENT TERMINATION (T-K3-SP ONLY) WARNING: Improper installation can cause nausea or asphyxiation, severe injury or death from carbon monoxide and flue gases poisoning. Improper installation will void product warranty.

• The vent terminator provides a means of installing vent pipe through the building wall and must be located in accordance with ANSI Z223.1/NFPA 54, or in Canada with CAN/CSAB149.1 and local applicable codes. • The sidewall vent terminator, TK-TV01, is recommended when the water heater is vented through a sidewall.

General rules for venting the T-K3-SP water heater are: 1.

Place the water heater as close as possible to the vent terminator.

2.

The vent collar of the water heater must be fastened directly to an unobstructed vent pipe.

3.

Do not weld the vent pipe to the water heater collar.

4.

Do not cut the vent collar of the unit.

5.

The weight of the vent stack must not rest on the water heater.

6.

The vent must be easily removable from the top of the water heater for normal service and inspection of the unit.

7.

The water heater vent must not be connected to any other gas appliance or vent stack.

8.

Avoid locating the water heater vent terminator near any air intake devices. These fans can pick up the exhaust flue products from the water heater and return them to the building. This can create a health hazard.

9.

Avoid using an oversized vent pipe or using extremely long runs of the pipe.

10. Locate the vent terminator so that it cannot be blocked by any debris, at any time. Most codes require that the terminator be at least 12 inches above grade, but the installer may determine if it should be higher depending on the job site condition and applicable codes. 11. For rooftop venting, a rain cap must be installed.

- 11 -

• Regarding the clearance from the terminator to the air inlet or opening, refer to the next page. • Install a condensation drain in the venting. • Follow the vent system to vent manufacturer’s instruction and local code. • Do not common vent or connect any vent from other appliances to the T-K3-SP vent. • Use 4” category III approved or Special BH, single or double wall stainless steel vent

pipe.

- 12 -

Canada Direct vent and other than Direct Vent

U.S.A Direct vent

Other than Direct Vent 1 foot

A

Clearance above grade, veranda, porch, deck, or balcony.

1 foot

1 foot

B

Clearance to window or door that may be opened.

3 feet

1 foot

*

*

4 feet from below or side opening. 1 foot from above opening. *

*

*

*

* * *

* * *

* * *

3 feet

*

*

3 feet

*

3 feet

1 foot

6 feet

3 feet

* 4 feet from below or side opening. 1 foot from above opening. 3 feet

7 feet

*

7 feet

1 foot

*

*

C D E F G H I J K L M

Clearance to permanently closed window Vertical clearance to ventilated soffit located above the vent terminator within a horizontal distance of 2 feet (61cm) from the center line of the terminator. Clearance to unventilated soffit Clearance to outside corner Clearance to inside corner Clearance to each side of center line extended above meter/regulator assembly Clearance to service regulator vent outlet. Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other application. Clearance to mechanical air supply inlet. Clearance above paved sidewalk or paved driveway located on public property. Clearance under veranda, porch deck, or balcony.

*For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CSA-B149.1, please use clearances in accordance with local installation codes and the requirement of the gas supplier. *Outdoor installation is considered as direct vent.

- 13 -

GAS SUPPLY AND GAS PIPE SIZING TO TURN OFF GAS TO APPLIANCE 1. Turn off all electric power to the water heater if service is to be performed.

2. Turn the manual gas valve located on the outside of the unit clockwise 3 to the off position. WARNING: Conversion of this unit from natural gas to propane or vise versa cannot be done in the field. Contact your local distributor to get the correct unit for your gas type. Conversion done by anyone other than the manufacturer will void all warranty. Takagi is not liable for any property and/or personal damage resulting from unauthorized conversions. *Check that the type of gas matches the rating plate first. 1.

The minimum and maximum inlet gas pressures are: Natural Gas

Min. 5.0” WC - Max. 10.5” WC

Propane Gas

Min. 8.0” WC - Max. 13.5” WC

2.

Gas pressure below this specified range for the T-K3-OS/SP and/or insufficient gas volume will adversely affect performance.

3.

Inlet gas pressure must not exceed the above maximum values; gas pressure above the specified range will cause dangerous operating conditions and damage to the unit.

4.

Until testing of the main gas line supply pressure is completed, ensure the gas line to the T-K3-OS/SP is disconnected to avoid any damage to the water heater.

MEASURING INLET GAS PRESSURE The T-K3-OS/SP cannot perform properly without sufficient inlet gas pressure. Below are instructions on how to check the inlet gas pressure. THIS IS ONLY TO BE DONE BY A

LICENSED PROFESSIONAL. 1.

Shut off the manual gas valve on the supply gas line.

2.

Open a faucet. The unit should turn on and the gas in the gas pipe line should purge. Leave the faucet on to keep the unit running until the unit shut down due to lack of gas supply. Then shut the faucet off.

3.

Remove the screw for the pressure port located on the gas inlet of the T-K3-OS/SP shown in the diagram to the right.

4.

Connect the manometer to the pressure port.

5.

Re-open the manual gas valve. Check to see that there are no gas leaks.

6.

Open some of the fixtures that use the highest flow rate to turn on the T-K3-OS/SP.

7.

Check the inlet gas pressure. When T-K3-OS/SP is on a maximum burn, the manometer should read from 5.0” to 10.5” WC for Natural gas, from 8.0” to 13.5” WC for Liquid Propane.

- 14 -

Size the gas pipe appropriately to supply the necessary volume of gas required for the T-K3-OS/SP (190,000 BTUH for both Natural Gas and Liquid Propane) using ANSI233.1/NAPA 54 in the USA or CAN/CSA B149.1 in Canada or local codes. Otherwise, flow capabilities and output temperatures will be limited. 1.

Install a manual gas shut-off valve between the T-K3-OS/SP and the gas supply line.

2.

When the gas connections are completed, it is necessary to perform a gas leak test either by applying soapy water to all gas fittings and observing for bubbles or by using a gas leak detection device.

3.

Always purge the gas line of any debris before connecting to the heater gas inlet.

Natural Gas Supply Piping Maximum Delivery Capacity of Cubic Feet of Gas per Hour of IPS Pipe Carrying Natural Gas of 0.60 Specific Gravity Based on Pressure Drop of 0.5” WC Based on Energy Content of 1100 BTU/Cubic Ft.: T-K3-OS/SP requires 173 Cubic Ft./hr. Unit: Cubic feet per Hour

Pipe Size inches ¾” 1” 1 ¼” 1 ½” 2”

Length in Feet 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 363 249 200 171 152 138 127 118 111 104 93 84 684 470 377 323 286 259 239 222 208 197 174 158 1404 965 775 663 588 532 490 456 428 404 358 324 2103 1445 1161 993 880 798 734 683 641 605 536 486 4050 2784 2235 1913 1696 1536 1413 1315 1234 1165 1033 936

200’ 72 135 278 416 801

Propane (LP) Gas Supply Piping Maximum Capacity of Propane (LP) Gas Based on 11” WC supply pressure at a 1.0” WC pressure drop Unit: kBTU per Hour

Pipe Size inches ¾” 1” 1 ¼” 1 ½” 2”

Length in Feet 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 200’ 567 393 315 267 237 217 196 185 173 162 146 132 112 1071 732 590 504 448 409 378 346 322 307 275 252 213 2205 1496 1212 1039 913 834 771 724 677 630 567 511 440 3307 2299 1858 1559 1417 1275 1181 1086 1023 976 866 787 675 6221 4331 3465 2992 2646 2394 2205 2047 1921 1811 1606 1496 1260

- 15 -

WATER CONNECTIONS FOR YOUR SAFETY, READ BEFORE OPERATING: Do not use this water heater if any part has been submersed under water. Immediately call a licensed professional to inspect the water heater and to replace any damaged parts.

1.

All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for potable water systems.

2.

A manual shut off valve must be installed on the cold water inlet to the water heater between the main water supply line and the T-K3-OS/SP.

3.

In addition, a manual shut off valve is also recommended on the hot water outlet of the unit. If the T-K3-OS/SP is installed within, or subjected to, a closed loop water system, a thermal expansion tank must be installed.

4.

Before installing the water heater, flush the water line to remove all debris, and after installation is complete, purge the air from the line. Failure to do so may cause damage to the heater.

5.

There is a wire mesh filter within the cold inlet to trap debris from entering your heater. This will need to be cleaned periodically to maintain optimum flow.

CAUTION: Do not reverse the hot outlet and cold inlet connections to the T-K3-OS/SP Water Heater. This will not properly activate the water heater.

- 16 -

PRESSURE RELIEF VALVE The FLASH T-K3-OS/SP has a high-temperature shut off switch built in as a standard safety feature (called a Hi-Limit switch) therefore a “pressure only” relief valve is required. 1.

This unit does not come with an approved pressure relief valve.

2.

An approved pressure relief valve must be installed on the hot water outlet.

3.

The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must follow local code.

4.

The discharge capacity must be at least 190,000 BTU/hr.

5.

The pressure relief valve needs to be rated for a maximum of 150 psi.

6.

The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash on anyone or on nearby equipment.

7.

Attach the discharge tube to the pressure relief valve and run the end of the tube to within 6" from the floor. This discharge tube must allow free and complete drainage without any restrictions.

8.

If the pressure relief valve installed on the T-K3-OS/SP discharges periodically, this may be due to a defective thermal expansion tank or defective pressure relief valve.

9.

The pressure relief valve must be manually operated periodically to check for correct operation.

- 17 -

ELECTRICAL CONNECTIONS WARNING: Follow the electrical code requirements of the local authority having jurisdiction. In the absence of such requirements, follow the latest edition of the National Electrical Code ANSI/NFPA 70 in the U.S. or the latest edition of CSA C22.1 Canadian Electrical Code, Part 1, in Canada. CAUTION: When servicing or replacing parts within the T-K3-OS/SP, label all wires prior to disconnection to facilitate an easy and error-free reconnection. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. 1.

The heater must be electrically grounded. Do not attach the ground wire to either the gas or the water piping.

2.

The FLASH T-K3-OS/SP water heater requires AC 120V 60 Hz electrical power supply that is properly grounded. • An on/off switch controlling the main power to the T-K3-OS/SP must be provided for service reasons; • Connect the power supply to the T-K3-OS/SP exactly as shown in the wiring diagram;

3.

A green screw is provided in the junction box to ground the connection.

4.

Can be hardwired or wired to a plug-in.

5.

The use of a surge protector is recommended in order to protect the unit from power surges.

REMOTE CONTROLLER CONNECTION • Minimum 18AWG wire (No polarity) • Maximum 150 feet long

・Please follow the TK-RE02’s manual. TK-RE02 (Optional)

Remote controller terminal on the computer board

When wiring the remote to the computer board, please put the wires through the hole on the bottom of the unit’s casing

- 18 -

INITIAL OPERATION FOR YOUR SAFETY, READ BEFORE OPERATING: • Check the GAS and WATER CONNECTIONS for leaks before firing it for the first time. • Open the main gas supply valve to the unit using only your hand to avoid any spark. Never use tools. If the knob will not turn by hand, do not try to force it; call a qualified service technician. Forced repair may result in a fire or explosion due to gas leaks. • Be sure to check next to the bottom of the unit because some gases are heavier than air and may settle towards the floor. • Check the GAS PRESSURE. Refer to p. 14. • Do not try to light the burner manually. It is equipped with an electronic ignition device which automatically lights the burner. • Check for PROPER VENTING and COMBUSTIBLE AIR to the heater. • Purge the GAS and WATER LINES to remove any air pocket. • Do not use this water heater if any part has been submersed under water. Immediately call a qualified service technician to inspect the water heater and to replace any damaged parts.

CAUTION: IF YOU SMELL GAS: • Do not try to start the water heater. • Do not touch any electric switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department. 1. Once the above checks 2. Fully open the manual 3. Open a hot water tap to have been completed, water control valve on the verify that water is flowing please clean filter of any water supply line. to that tap. debris. Refer to p. 23 for instructions.

Then close the hot water tap.

4. Fully open the manual 5. Turn on the 120 volt 60 Hz 6. Now you are ready to gas control valve power supply to the T-K3enjoy hours of endless installed. OS/SP water heater. hot water.

- 19 -

NORMAL OPERATION • Flow rate to activate the T-K3-OS/SP : 0.5 gallon per minute • Flow rate to keep the T-K3-OS/SP running : 0.4 gallon per minute

1. NORMAL OPERATION WITHOUT REMOTE CONTROLLER 1. Open a hot water tap.

2. Mix cold water with the hot to get the correct temperature water.

3. Close the hot water tap.

2. NORMAL OPERATION WITH REMOTE CONTROLLER: TK-RE02 (Optional) 1. Press the operation ON/OFF button.

2. Set temperature. (Example: 104°F)

The temperature is displayed on the remote controller when the remote controller is ON.

(unit: °F)

The temperature options 99

100

102

104

106

108

110

111

113

115

117

122

131

140

158

167

• Temperature settings 140°F and above are for heating applications only.

3. Open a hot water tap. Mix cold water with the hot if you need.

4. Close the hot water tap.

Lamp is OFF

Lamp is ON

WARNING Hot Water temperatures over 125°F can cause severe burns instantly or death from scalding. • The outlet hot water temperature of the FLASH T-K3-OS/SP water heater is factory set at 122°F. • Feel the water temperature before bathing or showering. - 20 -

FLOW • The flow rate through the FLASH T-K3-OS/SP is limited to a maximum of 7.0 GPM. • The temperature setting, along with the supply temperature of the water will determine the flow rate output of the unit. • Please refer to the temperature vs. gallons per minute chart on p. 38 to determine the likely flow rates based on your local ground water temperature and your desired outlet water temperature combination. • Based on the United States Department of Energy method of testing water heater output, the T-K3-OS/SP is rated for 240 gallons per hour (GPH) or 4.0 gallons per minute (GPM) for Natural Gas, and 251 GPH or 4.2 GPM for Liquid Propane, when raising the water temperature by 77°F (from 58°F to 135°F). • Refer to the chart to the right for typical household plumbing fixture flow rates to determine what the FLASH T-K3-OS/SP can do in a household application.

Household Flow Rates Appliance / Use

Flow Rate (GPM)

Lavatory Faucet Bath Tub Shower Kitchen Sink Dishwasher Washing Machine Taken from UPC 1997

1.0 4.0 2.0 1.5 1.5 2.0

FREEZE PROTECTION SYSTEM • This unit comes equipped with heating blocks to prevent freezing which can damage the heat exchanger. • For this freeze prevention system to operate, there has to be electrical power to the unit. Damage to the heat exchanger caused by freezing temperatures due to power loss is not covered under the warranty. • The freeze protection system will activate when the temperature drops below 36.5°F (2.5°C) and is rated to protect the unit down to 5°F (-15°C) in a wind-free environment. • Do NOT install the water heater in an area where the water heater is subject to temperatures (including wind chill) below 5ºF (-15ºC), as this will void the warranty and Takagi will not be responsible for any damage to the heat exchanger as a result of freezing. • If you will not be using your heater for a long period of time or if the temperatures (including the wind chill) will drop below 5ºF (-15ºC): 1. Drain the unit of water. Refer to p. 23. 2. Turn off your heater. This will keep your unit from freezing and being damaged. CAUTION: Only pipes within the water heater are protected by the freeze protection system. Any water pipes (hot or cold) located outside the unit will not be protected. Properly protect and insulate these pipes from freezing.

- 21 -

TEMPERATURE SETTINGS • There are 4 preset temperatures that you can select from by changing the dipswitch settings at the bottom left corner of the computer board. • The temperature has been preset at the factory to 122ºF (50ºC). • If you desire to change the set temperature with dipswitches, please refer to the following diagram. These temperatures are available: 113ºF, 122ºF, 140ºF, 167ºF. • 140ºF and 167ºF are for heating applications only. • If you desire a hot water temperature other than the 4 preset settings, please purchase the optional temperature remote controller (part No. TK-RE02). • With this optional TK-RE02 you can set the temperature from 99ºF to 167ºF with various increments. •

Please read the instructions carefully prior to installing the TK-RE02, as failure to do so could damage the temperature controller and/or the water heater, which will void the warranty.

• Turn off the power supply to the heater when you change the dipswitch settings. • Only change the switches with the dark squares. The dark squares indicate which direction the dipswitch should be set to.

- 22 -

MAINTENANCE AND SERVICE WARNING: Turn off the electrical power supply and close the manual gas control valve and the manual water control valve before servicing. • Clean the cold-water inlet filter. (Refer to diagram below) • Be sure that all openings for combustion and ventilation air are not blocked. • Check that the exhaust vent pipe is not blocked. • Check the gas pressure. • Keep the area around the water heater clear. Remove any combustible materials, gasoline or any flammable vapors and liquids. TAKAGI recommends having the unit checked once a year or as necessary by a licensed technician. If repairs are needed, any repairs should be done by a licensed technician.

UNIT DRAINING and FILTER CLEANING 1. Close the manual gas shut off valve. 2. Close the water shut off valve. 3. Open all hot water taps in the house. When the residual water flow has ceased, close all hot water taps. 4. Have a bucket or pan to catch the water from the unit’s drain plugs. Unscrew the drain plugs to drain all the water out of the unit. 5. Wait a few minutes to ensure all water has completely drained from unit. 6. Clean the filter: Check the water filter located within the cold inlet. With a tiny brush, clean the water filter of any debris which may have accumulated and reinsert the filter back into the cold water inlet. 7. Securely screw the drain plugs back into place. Hand- tighten only.

- 23 -

Drain Plug Drain Plug with Filter

Water Valve

Gas Valve

GENERAL TROUBLESHOOTING ~ TEMPERATURE and AMOUNT OF HOT WATER ~ PROBLEM

POSSIBLE SOLUTIONS

It takes long time to get hot water at the fixtures.

• The time it takes to deliver hot water from the T-K3OS/SP to your fixtures depends on the length of piping between the two. The longer the distance or the bigger the pipes, the longer it will take to get hot water. • If you would like to receive hot water to your fixtures quicker, you may want to consider a hot water recirculation system. (p. 32)

The water is not hot enough.

• Compare the flow and temperature. See the chart on p. 38. • Check cross plumbing between cold water lines and hot water lines. • Is the gas supply valve fully open? (p. 19) • Is the gas line sized properly? (p. 15) • Is the gas supply pressure enough? (p. 14) • Is the set temperature set too low? (p. 20, 22)

The water is too hot.

• Is the set temperature set too high? (p. 20, 22)

The hot water is not available when a fixture is opened.

• Make sure the unit gets 120V 60Hz power supply. • If you are using the remote controller, is the power button turned on? (p. 20) • Is the gas supply valve fully open? (p. 19) • Is the water supply valve fully open? (p. 19) • Is the filter on cold water inlet clean? (p. 23) • Is the hot water fixture sufficiently open to draw at least 0.5 GPM through the water heater? (p. 20) • Is the unit frozen? • Is there enough gas in the tank? (for LP)

The hot water turns cold and stays cold.

• Is the flow rate enough to keep the T-K3-OS/SP running? (p. 20) • If there is a recirculation system installed, does the recirculation line have enough check valves? • Is the gas supply valve fully open? (p. 19) • Is the filter on cold water inlet clean? (p. 23) • Are the fixtures clean of debris and obstructions?

Fluctuation in hot water temperature.

• • • •

Is the filter on cold water inlet clean? (p. 23) Is the gas line sized properly? (p. 15) Is the supply gas pressure enough? (p. 14) Check for cross connection between cold water lines and hot water lines. - 24 -

~ WATER HEATER ~ PROBLEM

POSSIBLE SOLUTIONS

Unit does not ignite when water goes through the unit.

• • • •

The fan motor is still spinning after operation has stopped.

• This is normal. After operation has stopped, the fan motor keeps running from 5 to 50 seconds in order to re-ignite quickly, as well as purge all the exhaust gas out of the flue.

Abnormal sounds come from the unit.

• Contact TAKAGI.

Is the flow rate over 0.5 GPM? (p. 20) Check for the filter on cold water inlet. (p. 23) Check for reverse connection and cross connection. If you use the remote controller, is the power button turned on? (p. 20)

- 25 -

TROUBLESHOOTING – ERROR CODES • •

All Takagi units are self diagnostic for safety and convenience when trouble shooting. If there is a problem with the installation or the unit, it will display a numerical error code on the TK-RE02 (if installed). If the TK-RE02 is not installed, the red LED at the bottom- right corner of the computer board will be blinking to communicate the source of the problem instead.

•

Consult the following chart for the cause of each error code.

TK-RE02 (Optional) Red LED

TK-RE02

Symptom

03

Incorrect Dipswitch Settings

70

Proportional Valve / Computer

31

Outlet Thermistor

32

Inlet Thermistor

39

Air-fuel Ratio Rod Failure

11

Ignition Failure

12

Flame Loss

55

Abnormal Main Gas Valve

51

Abnormal Solenoid Gas Valve

72

False Flame Detection

99

Imperfect combustion

Blinking Four Times

61

Abnormal Fan Motor

Blinking Five Times

10

Warning for 991 Error Code

Blinking One Time

Blinking Two Times

Blinking Three Times

- 26 -

Wiring Diagram A wiring diagram is located on the inside front panel of the appliance. Electrical Rating: 120 VAC, 60 Hz Note: If any of the original wiring supplied with this appliance must be replaced, it must be replaced with appliance wiring material (180c) or its equivalent. Replacement wires are available through Takagi.

- 27 -

FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the water heater area for evidence of leaking gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. WHAT TO DO IF YOU SMELL GAS. • Do not try to light any appliance. • Do not touch any electric switch, do not use any phone in your building, • Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. • If you cannot reach your gas supplier, call the fire department. C. Use only your hand to turn the gas valve knob. Never use tools. If the knob will not turn by hand, don't try to repair it. Call a qualified service technician. Forced or attempted repair may result in a fire of explosion. D. Do not use this water heater if any part has been under water. Immediately call a qualified service technician to inspect the water heater and to replace any damaged parts.

OPERATING INSTRUCTIONS 1. STOP! Read the safety information above or in the Owners Manual. 2. Turn off all electric power to the water heater. 3. Do not attempt to light the burner by hand. 4. Turn the manual gas valve located on the outside of the unit clockwise ↻ to the off position. 5. Wait five (5) minutes to clear out any gas. If you then smell gas. STOP! Follow "B" in the safety information above on this label. If you don't smell gas, go to next step. 6. Turn the manual gas valve located on the outside of the unit counter clockwise ↺ to the ON position. 7. Turn on all electrical power to the water heater. 8. If the water heater will not operate, follow the instructions “to Turn Off Gas to water heater" and Call your service technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE 1. Turn off all electric power to the water heater if service is to be performed. 2. Turn the manual gas valve located on the outside of the unit clockwise ↻ to the off position.

- 28 -

DANGER

Vapors from flammable liquids will explode and catch fire causing death or severe burns. Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near the water heater. Keep flammable products: 1. Far away from heater. 2. In approved containers. 3. Tightly closed 4. Out of children's reach

Vapors: 1. Cannot be seen 2. Vapors are heavier than air 3. Go a long way on the floor 4. Can be carried from other rooms to the main burner by air currents

WARNING: Do not install water heater where flammable products will be stored. Read and follow water heater warnings and instructions. If owner’s manual is missing, contact the retailer or manufacturer.

WARNING The outlet hot water temperature of the T-K3-OS/SP water heater is factory set at 122 ºF. Use this heater at your own risk. The set outlet water temperature can cause severe burns instantly or death from scalds. Test the water before bathing or showering. Do not leave children or an infirm person in the bath unsupervised.

DANGER Hot Water temperatures over 125 ºF can cause severe burns instantly or death from scalding. Children, disabled and elderly are at the highest risk of being scalded. Feel water temperature before bathing or showering. Temperature limiting valves are available. Ask professional person. WARNING: California Proposition 65 lists chemical substances known to the state to cause cancer, birth defects, death, serious illness or other reproductive harm. This product may contain such substances, be their origin from fuel combustion (gas, oil) or components of the product itself.

- 29 -

APPLICATIONS Space Heating Applications WARNING •

Toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol group must not be introduced into the system when used for open loop potable water and space heating.

•

The FLASH T-K3-OS/SP can be used to supply potable water and space heating and shall not be connected to any heating system or component(s) previously used with non-potable water where any chemicals were added to the water heating appliances.

•

When the system requires water for space heating at temperatures higher than required for other uses, a means such as a mixing valve shall be installed to temper the water for those other uses in order to reduce scald hazard potential.

•

Water temperature over 125 °F can cause severe burns instantly or death from scalds.

•

Chemicals such as diluted Glycol can be used for radiant floor, Hydro/fan coil air or Baseboard heating only. The diluted solution of glycol must contain LESS than 30% of Glycol.

Heating application only:

* Size the pump to provide about 2 GPM through the system at 15 Ft of Head plus applications and piping head losses. 2 GPM will allow the system to operate at its optimal performance. . * If the application requires a higher recirculating flow rate, make sure that the recirculating flow rate is no greater than 4 GPM. If the flow rate is too high, the system could be damaged by erosion.

This is a concept drawing only.

- 30 -

Dual-Purpose Hot Water Heating (Domestic and Space Heating):

* Size the pump to provide at least 2 GPM through the system at 15 Ft of Head plus applications and piping head losses. 2 GPM will allow the system to operate at its optimal performance. * If the application requires a higher re-circulating flow rate, make sure that the re-circulating flow rate is no greater than 4 GPM. If the flow rate is too high, the system could be damaged by erosion.

Priority Control Devices such as a flow switch, an Aquastat or other electronic controller can be used to prioritize the domestic water system over the heating system. Warning: Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Standard Code, ANSI Z21. 10.3. Warning: This illustration is a concept design only. The reference to the 1/8th hole in check is only for the State of Massachusetts. There are a wide variety of variations to the application of controls and equipment presented. Designers must add all necessary safety and auxiliary equipment to conform to code requirements and design practice. For more details, contact the Takagi Technical Department at (888) 882-5244

- 31 -

Recirculation (Aquastat-controlled pump)

* Size the pump to provide at least 2 GPM through the system at 15 Ft of Head plus piping head losses. 2 GPM will allow the system to operate at its optimal performance. * If the application requires a higher re-circulating flow rate, make sure that the re-circulating flow rate is no greater than 4 GPM. If the flow rate is too high, the system could be damaged by erosion.

This is a concept drawing only.

- 32 -

OPTIONAL ITEMS 1. TK-RE02 Temperature Remote Controller The TK-RE02 Temperature Remote Controller has two functions. It allows the output temperature from the T-K3-OS/SP to be adjusted within the range of 99 °F to 167 °F, and it also works as a diagnostic tool that will give a concise error code whenever there is a problem with the unit. The temperature options are 99°F, 100°F, 102°F, 104°F, 106°F, 108°F, 110°F, 111°F, 113°F, 115°F, 117°F, 122°F, 131°F, 140°F, 158°F, and 167°F. See the trouble shooting section for information on possible error codes. 3. TK-TV03 Vent Damper (for T-K3-SP) The TK-TV03 Vent Damper prevents the backflow of air through the exhaust vent. This is a CSA tested Takagi component. This helps prevent harmful exhaust gases from entering the home, as well as helping to prevent the unit from freezing in areas where cold air can be blown or drawn into the exhaust system. Install this vent damper in accordance with Takagi’s installation instructions, and any applicable codes.

2. TK-TV01 Vent Terminator (for T-K3-SP) This terminator can be used where a T-K3-SP is going to be vented out through a wall. This is a CSA tested Takagi component. Connect the Category III stainless steel vent pipe from the top of the unit to the backside of this terminator to exhaust flue gases through the wall without a thimble. Install this vent terminator in accordance with Takagi’s installation instructions and any applicable codes.

4. TK-TV04 Vent Cap (for T-K3-SP) The TK-TV04 Vent Cap is for outdoor installation with the TK3-SP water heater. The cap is installed on the top of the unit, instead of connecting an exhaust vent pipe. The cap will prevent any debris that might be in the environment from entering the unit and causing damage or a fire hazard, as well as preventing rain or other weather from entering the unit.

- 33 -

COMPONENTS DIAGRAM Case assembly 004 001 702 002

004

052 001

052

702 002

054

706

053 707 005 050 054

T-K3-SP

706 T-K3-OS

053 707

050

005 052

Computer board assembly 701

718

716 711

708

710

405 406 713 709 712 714

- 34 -

Burner assembly 109

151

102 101 117

106 107 115 114

716 104 112 151

153

116

704

150

105

110

120

118 156 111

103

104

123 715 157

159 152

113

705

154 703

153

119 121 T-K3-SP 717

158 704

122

708

108

101

Burner assembly

109

Burner plate

117

Burner holder gasket

102

Combustion chamber

110

Damper

118

Pressure port

103

Manifold

111

Fan damper

119

Urethan tube

104

Fan motor

112

Rod cap

120

Manifold gasket

105

Gas valve assembly

113

Gas inlet ring

121

Surge box plate

106

Flame rod

114

Burner window

122

Igniter plate

107

Igniter rod

115

Rod holder gasket

123

Wire clamp 60

108

Gas inlet

116

Rod holder

- 35 -

12

Water way assembly 408 401 413

409

418 419 451

407

411 401 402

T-K3-OS

410 412

457

454

452 458 403

454

458

453

415 052

414

456

456

404

416

406

405

450

T-K3-SP 455

417

450

401

Heat exchanger assembly

407

Hi-limit switch

414

Inlet drain plug

Flow adjustment valve and Flow sensor

408

Silicon ring (SP)

415

Inlet water filter

402

409

Over heat cut off fuse

416

Inlet heater

403

Water inlet

410

Heater

417

Outlet drain plug

404

Water outlet

411

Pipe heater fixing plate

418

Exhaust

405

Oｕｔｌｅｔ thermistor

412

Fuse fixing plate 18

419

Silicon ring (OS)

406

Inlet thermistor

413

Fuse fixing plate 14

- 36 -

PARTS LIST Case assembly 001

Case assembly

002

Front cover

003

Air blockage plate

004

Bracket

005

Junction box

054

Nylon clamp

Hex head screw washer M4×12

155

Pan screw washer M4×10

156

Screw M3×8

154

Hex head screw M4×8

157

Screw washer M3×10

458

Fastener "14-22"

715

AC120V power ON-OFF switch

716

Igniter and Freeze protection wire

050

Coating screw washer M4×12

051

Coating screw washer M4×10

052

Coating screw M4×10

053

Pan screw M4×10

153

Burner assembly 150

Screw M4×10

151

Pan screw M4×8

152

Pan screw M4×12

Water way assembly 450

Screw M4×6

454

O-ring P14 EPDM

451

Screw M3×6

455

O-ring P6 EPDM

452

O-ring P16 EPDM

456

O-ring P4 EPDM

453

O-ring P15 EPDM

457

Fastener "16A"

709

Flow sensor wire

Computer board assembly 701

Computer board

702

Transformer TD-227

703

Surge box

704

Igniter

711

Gas valve wire

717

High voltage ignite cable

705

Freeze protection thermostat

712

Flow adjustment valve wire

718

AC120V wire

706

Fuse

713

Fan motor cable

707

Fuse box 714

Proportional gas valve wire

708

Computer board cover

710

Flame rod wire

- 37 -

Out Put Temperature vs. GPM (Max. 7.0 GPM) with Various Ground Water Temperature Assuming Correct Gas pipe size 8.0

7.0

6.0 Out Put Hot Water GPM

Output Hot Water GPM

5.0

4.0

3.0

2.0

1.0

0.0

90

95

100

105

110

115

120

125

130

135

140

150

160

165

170

175

180

40 F

6.2

5.7

5.2

4.8

4.4

4.1

3.9

3.7

3.5

3.3

3.1

2.8

2.6

2.5

2.4

2.3

2.2

50 F

7.0

6.9

6.2

5.7

5.2

4.8

4.4

4.1

3.9

3.7

3.5

3.1

2.8

2.7

2.6

2.5

2.4

7.0

6.9

6.2

5.7

5.2

4.8

4.4

4.1

3.9

3.5

3.1

3.0

2.8

2.7

2.6

7.0

6.9

6.2

5.9

5.4

5.0

4.7

4.1

3.6

3.4

3.3

3.1

3.0

60 F 70 F

Out put Hot Water Temperature 40 F

50 F

- 38 -

60 F

70 F

WARRANTY Takagi units must be installed by licensed professionals; installation done by anyone other than licensed professionals will result in the Nullification of the Takagi warranty. To be protected by the warranty, the enclosed warranty card must be completed and returned within 45 days of original purchasing date by retailed buyer. Proof of copy of original purchasing date must be sent in with the warranty card. Failure to return the warranty card in due time will void any warranty claims. Based on the condition herein, the customer may register online with attached proof of original purchasing date via the Internet (www.takagi.com/warranty). General terms of limited warranty: The manufacturer, Takagi Industrial Co. USA, Inc. will honor our warranty to the original retailed buyer only, and it is not transferable. This warranty strictly covers failed mechanical and electrical parts due to factory defects in normal usage and within the applicable period specified below excluding field labor expenses for service, repairs, reinstallation, permits, or removal and disposal of the failed water heater, or defective component parts and shipping. Takagi is not liable for any special, incidental, or indirect consequential damages including property or personal damages, loss of use, failure to install drain pan under unit, or inconvenience. Parts Warranty: If a mechanical and/or electrical part except the heat-exchanger fails within five (5) years in normal residential and three (3) years in commercial with proper installation (see instruction from installation manual) from the purchasing date, Takagi Industrial Co. USA Inc. will furnish a replacement part(s) excluding field labor and shipping. Heat-Exchanger Warranty: If the heat-exchanger fails within ten (10) years in normal residential operation with proper installation (see instruction from installation manual) from the installation date, Takagi Industrial Co. USA Inc. will furnish a brand new heat-exchanger or a refurbished or conditioned tank-less water heater with same model. For commercial, industrial or/ and recirculation applications or/ and more than a single family residential dwelling, the heat-exchanger is covered within three (3) years of usage excluding labor and shipping. This warranty will not cover the followings: 1. Any Takagi unit that is not installed by a licensed plumber, gas installer, or contractor. 2. Defects or malfunctions due to improper installation, abnormal application, and lack of maintenance. 3. Damage due to abuse, accident, fire, flood, freezing, or any act of GOD. 4. Failure of Takagi unit due to the water heater being operated in a corrosive, chemically contaminated, lint, fiber glass, or any similar environment. 5. Failure of Takagi unit due to abnormal hardness water quality (scale build up), incorrect water pressure, untreated well water, high (excessive) supplied gas pressure from Uniform Plumbing Code specifications. 6. Failure due to excessive temperature that is higher than the factory calibrated temperature limits. 7. Failure or damage due to unauthorized alterations, attachments, repair and/or improperly converted gas type as specified on the rating plate. 8. Damage due to freezing environment without proper preventive measure as instructed in the installation manual. 9. Damage from condensation due to extensive vent length without condensation drip and/or not following the installation manual. 10. Damage from not installed in accordance with applicable local, state codes, ordinances and good trade practices. 11. Unit is installed outside the United States of America and Canada excluding U.S. territories.

- 39 -

19H046

- 40 -